If you put a property up as collateral, then the lender knows that they can get the money back from you.

如果你以资产作抵押,贷方就知道债务偿还有了保障

耶鲁公开课 - 金融市场课程节选

The Fed is effectively just saying we'll take those assets as collateral for loans to you.

美联储有效率地说,我们将把那些资产视为你们贷款的抵押品。

耶鲁公开课 - 金融市场课程节选